1.Extensive Palatal Necrosis Secondary to Chrysomya bezziana Myiasis: A Case Report
Ken Wong Siong Hou ; Syamsa Rizal Abdullah ; Mohd Rafizul Mohd Yuso ; Ahmad Firdaus Mohd Salleh ; Syed Nabil Syed Omar
Archives of Orofacial Sciences 2025;20(1):59-68
Extensive Palatal Necrosis Secondary to Chrysomya bezziana Myiasis: A Case Report
Oral myiasis, a rare condition characterised by infestation of dipterous larvae in the oral cavity,
poses unique diagnostic and therapeutic challenges. Herein, we present a case study of a 35-yearold quadriplegic man presenting with oral myiasis localised to the palatal region, likely attributable to
malnutrition and suboptimal oral hygiene. Manifestations comprised oral bleeding, fever, and necrotic
palatal ulcers infested with maggots. Initial diagnostic considerations encompassed mucormycosis and
neoplastic lesions; however, further scrutiny revealed primary palatal myiasis caused by Chrysomya
bezziana species. Therapeutic interventions entailed bedside maggot removal and meticulous wound
care, with topical hyaluronic acid application and oral hygiene guidance. This case underscores the
significance of uncommon conditions such as palatal myiasis, especially among patients with intricate
medical backgrounds. A comprehensive diagnostic approach and optimal treatment ensure favourable
outcomes.
2.Effects of Temperatures on Larval Development of Chrysomya megacephala (Fabricius) and Chrysomya rufifacies (Macquart) (Diptera: Calliphoridae): Application in Forensic Science
Ahmad Firdaus Mohd Salleh ; Anita Talib ; Mohamed Abdullah Marwi ; Noor Hayati Mohd Isa ; Syamsa Rizal Abdullah ; Raja Muhammad Zuha Raja Kamal Bashah ; Baharudin Omar.
Malaysian Journal of Health Sciences 2009;7(2):89-96
Chrysomya megacephala (Fabricius) and Chrysomya rufifacies (Macquart) are two important species of blow flies that could be utilised as indicators to
estimate the Post Mortem Interval (PMI) of corpses in forensic science. Determination of PMI of corpses is based on the larva size and its development
stages. Development studies of eggs, larvae and pupae of Ch. megacephala and Ch. rufifacies at 27ºC, 30ºC and 33ºC were carried out using an insect growth chamber. Data from these studies were used to construct growth curves
and Accumulated Degree Hours (ADH) for both species. Ch. megacephala needs 9.15 days to complete one life cycle at 27ºC, 8.54 days at 30ºC and 6.76 days
at 33ºC. Development for Ch. rufifacies is slower than Ch. megacephala and takes 9.92 day at 27ºC, 9.13 days at 30ºC and 7.44 days at 33ºC. Eggs of the
two species hatch faster at 33ºC compared to the two other temperatures. Low value of ADH shows shorter life cycle of that particular species. This study’s
findings are useful in estimating PMI of the corpses found under various environmental temperatures.


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